There is a better way, but its not auto. you just need a sprinkler, a melee or mage character, and a island of variety. you place down the sprinkler next to the mono spawn at the load in point... then go ham killing green and blue mono's. if you have a pet, you can just let them get killed by the pet while afk. the green mono's will keep your pet alive. i suppose you can box in the spawn area to concentrate the mono's rather then them filling up the arena. you can also use absorbers and markets to suck up the loot (there is a ton of it).
